1. Veterans Health Administration. Analysis of VA health care utilization among Operation Enduring Freedom (OEF), Operation Iraqi Freedom (OIF), and Operation New Dawn (OND) Veterans: Cumulative from 1st qtr FY 2002 through 1st qtr FY 2013 (October 1, 2001 –December 31, 2012). 2013. Retrieved on December 12, 2014 from http://www.publichealth.va.gov/docs/epidemiology/healthcare-utilization-report-fy2013-qtr1.pdf.
2. Psychiatric status and work performance of veterans of operations enduring freedom and Iraqi freedom;DA Adler;Psychiatr Serv,2011
3. Psychiatric diagnoses, comorbidity, and functioning in National Guard troops deployed to Iraq;SM Kehle;J Psychiatr Res,2011
4. Defense Medical Surveillance System. DoD numbers for traumatic brain injury worldwide—totals. Prepared by the Defense and Veterans Brain inury Center. 2014. Retrieved on 12/23/14 from http://dvbic.dcoe.mil/sites/default/files/DoD-TBI-Worldwide-Totals-2000-2014-Q1-Q3-Dec1-2014.pdf.
5. Systematic search and review procedures: Results of the WHO collaborating centre task force on mild traumatic brain injury;LJ Carroll;J Rehabil Med,2004